A personal context layer that connects your emails, notes, plans, and data — so you and AI can actually operate on it.
Your life is scattered across Gmail, Notion, calendars, documents, travel plans, chats, and random tools. Each one works. None of them connect.
So you end up searching instead of knowing. Rewriting the same thoughts. Planning in isolation. Making decisions with partial information.
Even with AI, the problem doesn't go away. Because AI doesn't have your context.
"We suffer more often in imagination than in reality."
Second Brain helped you capture information. Seneca helps you operate on your life.
Instead of storing things in silos, you build a system where your emails connect to your plans, your notes connect to your decisions, and your calendar connects to your goals.
Everything maps to four primitives — and the relationships between them are where context is created.
People, places, companies, books, topics
Meetings, trips, timelines, milestones
Emails, notes, documents, receipts
Goals, plans, decisions, experiments
"It is not that we have a short time to live, but that we waste a great deal of it."
Be part of the shift from tools to systems.
Coming Soon